29 inHG is right about atmospheric pressure, which, at WOT seems reasonable. What does it look like at idle?

 

At idle it sits at around 10-11 inHG based on the last few live data scans I've taken.

Also these are a couple of the screen recordings of the live data from my drive last night:

If there is any other pertinent information I can get from my scan tool I can set it up differently and go on another test drive. Unfortunately though I can only select up to 5 live data sources at a time with my particular unit.

 

I am just not seeing anything wrong there.... Everything looks good..... the numbers relate to each other reasonably..... But, I only watched the first three minutes of the first video. (couple 0 to 50mph runs?)

What does absolute throttle position say when you have the pedal on the floor? (don't need to have engine running for that test, just need the ignition on.)

 

When I tested it the other day with the engine off I got 69% when smashing the pedal, and manually opening the throttle body with my hands I got 71%.

 

You may want check continuity of the ground wire. #2 is what you need to test. I think you can test this with the engine off key on. See what readings you get both idle and WOT.

 

See below from FSM

The PCM supplies approximately 5 volts to the
TPS. The TPS output voltage (input signal to the
PCM) represents the throttle blade position. The
PCM receives an input signal voltage from the TPS.
This will vary in an approximate range of from .26
volts at minimum throttle opening (idle), to 4.49 volts
at wide open throttle. Along with inputs from other
sensors, the PCM uses the TPS input to determine
current engine operating conditions. In response to
engine operating conditions, the PCM will adjust fuel
injector pulse width and ignition timing.
The PCM needs to identify the actions and position
of the throttle blade at all times. This information is

needed to assist in performing the following calcula-
tions:

• Ignition timing advance
• Fuel injection pulse-width
• Idle (learned value or minimum TPS)
• Off-idle (0.06 volt)
• Wide Open Throttle (WOT) open loop (2.608
volts above learned idle voltage)
• Deceleration fuel lean out
• Fuel cutoff during cranking at WOT (2.608 volts
above learned idle voltage)

• A/C WOT cutoff (certain automatic transmis-
sions only)

 

As long as your voltages are close don't get hung up on the % throttle being displayed. That is calculated as percentage of the reference voltage, the important thing is that the pcm learns what the min and max voltage is.

 

I'll have to re-test to verify what the voltage is at idle (both closed and open loop), hopefully I can get that done this evening or tomorrow night and report back. The PCM was not reset when I installed the new OEM sensor, I'm wondering if it might've learned a poor or inadequate voltage from the Duralast sensor I had in there at the time, and would benefit from resetting it and allowing it to re-learn the voltage with the new sensor.

 

I verified that the ground wire had continuity with ground the other day so thankfully I can scratch at least one potential issue off the seemingly growing list lol

 

So I reset the PCM and tested the signal wire again at idle and WOT; idle was 0.63-0.65V and WOT was 3.46V so something is obviously awry. Additionally, while idling and getting up to temp the engine was running really rough with before eventually self correcting (this was previously an issue with the old TPS but after swapping the new OEM one in the issue went away, but now is back). Also, while going uphill at WOT the signal wire only read 2.73V.

I'm looking through the service manual now to see if there's any diagnostic information but obviously there's an issue somewhere as my WOT voltage is NOT 2.608V above the idle voltage/minimum voltage, yet I'm not getting a code for low voltage. Over two years after buying this truck and I'm still trying and failing to iron out all the kinks